Double-acting pump-syringe



mvENTOR M ATTORNEY n ccccccc ,Vllv 41% Patented Oct. 12,1880.

(No Model.)

J RAMSEY, Jr Double Acting Pump Syringe.

WITNLSSES UNITED STATES PATENT OFFICE.

JONATHAN RAMSEY, JR., OF WEST MERIDEN, CONNECTICUT.

DOUBLE-ACTING PUMP-SYRINGE.

SPECIFICATION forming part of Letters .Patent No. 233,279, dated October 12, 1880.

Application filed June 19, 1880.

To all whom it may concern:

Be it known that I, JONATHAN RAMsEY, Jr., of West Meriden, in the county of New Haven and State of Connecticut, have invented a new and valuable Improvement in Double-Acting Pump-Syringes; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, making a part of this specification, and to the letters and figures of reference marked thereon.

The drawing is a representation of a longitudinal central section of m'y improved syringe.

This invention has relation to improvements in double-acting pump-syringes for administering enemas tohuman beings or animals.

The object ot' the invention is to devise a double-acting pump-syringe which will inject a constant stream of enema solution into the rectum when once filled and operated, thereby preventing air from getting into the bowels and saving great inconvenience to the operator and patient.

The nature of the invention will be fully set forth hereinafter.

In the accompanying drawing, the letter A designates the barrel of the double acting pump-syringe, closed at one end by a screwcap, a, and provided at the other with a removable nozzle, b. The barrel is provided at its end next the nozzle with a condensingchamber, B, communicating with the body of the barrel by means of a perforation, c, in the diaphragm d, forming said chamber, which perforation is closed by a valve, c, opening outward from the diaphragm. Inside of the barrel is a piston, O, operated by arod, C', extending through a packed opening, c', in the cap a. At one side of the barrel is a waterpassage, D, opening at one end into thechamber B, and at the other, .by an aperture, c, with the opposite end of the said barrel. This opening e is provided with a valve, e, opening outward. D indicates a second water-passage at the side of the barrel, and communicating therewith at each end by means of the openings f g, both of these openings being unprovided with valves, and communicating with the barrel.

(No model.)

E indicates a suction pipe opening into the passage Dl at about the middle of its length, at h. At each side of this opening, and extending across the passage D', are the diaphragms l l', closed respectively by the valves M', arranged upon a rod, j, having endwise movement through the guides ac. When one of these valves closes the opening in the adjacent diaphragm the other valve discloses the `opening in the other diaphragm.

The operation of the double-acting pumpsyringe is as follows: The piston moving in the direction indicated by the arrow, and the end of the suction-pipe being in the solution, the valve e in chamber B closes, the valve e in the water-passage D opens, the valvez' in water-passage D closes, and valve c" opens. The solution then is drawn up the suctionpipe, passes through passage D', and through the opening g into the pump-barrel. At the same time the solution in front of the piston is forced out of the barrel into the passage D through the valve c", and passes into the chamber B through the opening p, and escapes from the said chamber out of the nozzle. The reverse movement of the piston opens the valve c in chamber B, closes the valve c in the water-way D, and closes the valve t and opens the valve c' in the water-way D. The solution in front of the piston in the barrel is forced through the valve c into the chamber B, and thence out of the nozzle, and a fresh supply is drawn up through the suction-tube E into the water-way, thence through the opening f into the barrel behind the piston.

Thus it will be perceived that while the pumpsyringe is being emptied on one side of the piston it is being filled up on the other, by which means a constant flow is kept up and wind is prevented from getting into the bowels of the patient.

The pump-syringe with its water-ways is within a cylindrical sheathing, S, made in two sections, In, n', which are passed over the ends of the instrument and united at their meeting edges by a lap-joint, i. This device causes the pump-syrin ge to present the usual finished appearance common in such instruments, and prevents the water-ways from being battered and rendered leaky by careless handling.

What I claim as new, and desire to secure ing into opposite ends of' the barrel, the aperby Letters Patent, is tured diaphragms l l', the endwise -movable 15 The combination, in an enema double-aet valve-rod j, the valvesi', and the suction-pipe ing pump syringe, with the barrel A, havopening into the way D between the diaing the nozzle b, piston C, and piston-rod C', pbragms, substantially as specied. and the chamber B, having the opening c and In testimony that I claim the above I have Y the valve e, closing the said opening and vihereunto subscribed my name in the presence zo of two witnesses.

JONATHAN RAMSEY, J B.. Witnesses:

A. B. LYMAN,

B. SOPER.

bratng toward the nozzle to disclose the said opening, of the water-ways D 1)', having respectively the opening p, leading into the chamber B, and the opening e, with valvec", opening outwardly, and the openingsfg, lead- 

